Hashtable doesn't allow `null` values. So, instead of pair `containsKey`/`remove` calls, we can directly call `remove` and then compare result with `null`. https://github.com/openjdk/jdk/blob/2c461acfebd28fe5ef62805cbb004f91a3b18f08/src/java.base/share/classes/java/util/jar/JarVerifier.java#L433-L436
------------- Commit messages: - [PATCH] Avoid redundant Hashtable.containsKey call in JarVerifier Changes: https://git.openjdk.java.net/jdk/pull/8935/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8935&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8287696 Stats: 7 lines in 1 file changed: 0 ins; 5 del; 2 mod Patch: https://git.openjdk.java.net/jdk/pull/8935.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/8935/head:pull/8935 PR: https://git.openjdk.java.net/jdk/pull/8935
